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The Stumpjumper Comp Alloy has a neatly finished aluminium frame, but at 3275 grams it is significantly heavier (approx. 1200 grams) than the carbon version. The gears on the "Stumpi" are changed via Sram's entry-level NX groupset. The slightly shorter suspension travel in comparison ensures a good compromise between propulsion and comfort. Compared to the competition, Specialized relies on a somewhat tamer 34 mm Fox with 140 millimetres of travel - albeit only in the affordable Rhythm version. This saves around 100 grams compared to a 36 mm fork.
At 15.21 kilos including pedals, the Stumpjumper remains the lightest bike on test. Radon Slide Trail and accelerates well. The drive-neutral rear triangle makes the shock platform completely superfluous and is surprisingly stable even when pedalling out of the saddle. In addition, the Specialized tyres roll quite well and, just like the sporty riding position, add points to the uphill account.
Long rear - smooth ride on the Specialized Stumpjumper
Downhill, the rear end with its tight 137 millimetres of travel initially left a rather firm impression. With more sag, however, the rear works much better and still has enough progression against bottoming out. Interesting: at 440-444 millimetres, the chainstays are quite long. In this respect, the aluminium frame differs significantly from its carbon counterpart. With the long rear end, the aluminium Stumpi is therefore on the smooth side and wants to be pulled onto the rear wheel with a lot of effort.
Conclusion on the Specialized Stumpjumper Comp Alloy
Peter Nilges, BIKE test manager: "Thanks to the slightly shorter suspension travel and the drive-neutral rear triangle, the aluminium Stumpjumper also cuts a first-class figure on pedal-heavy tours. This positions it between the trail and all-mountain categories.
Technical data
General
- Price: 3750 Euro >> available here
- Frame material: aluminium
- Frame size: S1, S2, S3, S4, S5, S6 (Tested size S4 / 42 cm)
- More info->
Measured values
- Weight without pedals: 14.86 kg
- Front / rear suspension travel: 142 / 137 mm
Equipment
- Fork: Fox 34 Float Rhythm Fit Grip
- Shock: Fox Float DPS
- Crank: Sram NX Eagle
- Gear system: Sram NX 1 x 12
- Ratio / bandwidth: 30; 10-50 / 500 %
- Brake system / disc (front / rear): Sram G2 R / 200 mm / 180 mm
- Telescopic post / stroke / Ø: X-Fusion Manic / 170 mm / 34.9 mm
- Wheels: Specialized 29-wheel rims; Specialized hubs
- Tyres: Specialized Butcher / Purgatory Grid T9 / T7 29 x 2.30
- Ease of maintenance: medium
You can download the complete test of our all-mountain bikes here:
Test All Mountains 2022 from BIKE 7/2022
